Medical Terminology Letter I
| TERM | MEANING |
| iatr/o | treatment, physician |
| ichthy/o | fish |
| -ician | specialist |
| icter/o | jaundice |
| ide/o | idea, mental images |
| idi/o | individual, distinct, unknown |
| ile/o | ileum |
| ili/o | ilium |
| immun/o | protection, immune |
| infra- | below, beneath |
| inguion/o | groin |
| inter- | between |
| intra- | within |
| iod/o | iod/oiodine |
| ion/o | ion |
| ipsi- | same |
| ir/o, irid/o | iris |
| ischi/o | ischium |
| isch/o | suppress, restrain |
| is/o | equal |
| -ist | specialist |
| ithy- | erect, straight |
| -itis | inflammation |
| ixod/i | ticks |